helpful tip

#retrocomputing

@gloriouscow One might think "well no one would make such a mistake, duh!" but it's actually super easy to accidentally do this. I've had it happen with mere 8-bin chips even... (Ironically I'm thinking of socketed OPAMPs here as I don't have so much experience with PCs where you could actually swap chips out, but in other words it's still a thing.)

The worst thing was I had one that bent enough that when I tried to bend it back with pliers it broke off.  

@nazokiyoubinbou we've all done it. maybe not three simultaneously - the internally bent pin is particularly nefarious because its hard to see.
@gloriouscow Oof, you're not kidding. I missed it even in the illustration here clearly showing it...
@gloriouscow perhaps spin it 180 degrees.

@adorfer

it is a scan from a manual

@adorfer @gloriouscow I’m pretty sure you should.

The indent on the IC should align with on the DIP socket.

@gloriouscow

You laugh but I'm saving this to my clip art folder for when I write instructions for my soldering classes. It's a good clear drawing of everything that can go wrong.

@futurebird @gloriouscow Needs the off-by-one pin error and the magic smoke escaping to show everything.

@kim @gloriouscow

Or have the whole thing in backwards...

@futurebird @gloriouscow My usual trick is to carefully pay attention to the notch/dot to ensure that doesn't happen, oblivious to Past Me having failed to be as rigorous when installing the socket. 🤦‍♀️
@gloriouscow Half my console mods look like this... But it's on purpose. You gotta route some legs elsewhere on the motherboard. 😩
@gloriouscow this image hurts, like having your own fingers bent the wrong way
@gloriouscow you're telling me i've been doing it wrong zhis whole time??
@gloriouscow reminds me of piggybacking ROM/DRAM chips
(you have to have separate CAS/RAS and CS pins, most other are connected 1:1 so its often easier to just lift the few and solder the rest one on another)
@gorplop It's the lazy way to replace a bad DRAM, i've done it :D

@gloriouscow

Oh its ok, that's why there's so many pins.

@gloriouscow I felt physical pain seeing this.
@gloriouscow I just know these things demand a blood sacrifice. Poking your finger, ideally under the finger nails or something.
@gloriouscow the pin that is fourth from the right, bent outwards: the socket does not have a hole for that pin
the chip installation was doomed to be incorrect
@gloriouscow that hurts to look at
@gloriouscow depends, if you want to alter the functionality of the chip this might be correct.
@gloriouscow Please CW your gore posts.
@gloriouscow so thats why my stuff won't work
@gloriouscow reminds me of the WOM (write-only memory) data sheet chart of “NUMBER OF INSERTIONS” versus “NUMBER OF INTACT PINS REMAINING”
@gloriouscow Nice illustration but it misses some important details. Mainly, which are the pins that should be bent for correct installation :P
@gloriouscow I’ve been there. Oh yes, I’ve been there #DIP